Almost everyone starts with PLA and, sooner or later, wonders whether to switch to PETG. The answer depends on what the part is for. This PETG vs PLA comparison uses the medians of the datasheets in the library, not opinions.
PLA vs PETG differences in numbers
Medians from each material's datasheets. Click a material to see its full range.
PLA or PETG: which is stronger
It depends on what you mean by strong. PLA is stiffer: its tensile modulus is higher, so it deforms less under load, and its tensile strength is similar or slightly higher on many datasheets. But it is brittle: it snaps with almost no bending. PETG has a higher elongation at break, absorbs impacts better and holds up for clips and parts that flex. For a part that must be rigid and precise, choose PLA. For one that will take knocks or repeated stress, choose PETG.
Heat and outdoor resistance
This is the clearest difference. PLA softens near its glass transition, around 60 °C, and a part can warp inside a car parked in the sun. PETG takes quite a bit more before it softens, and it resists water and many chemicals better. For outdoor use and direct sun, neither is ideal: ASA is the material made for the weather.
Temperature and ease of printing
- PLA: a cooler nozzle, a warm or even cold bed and plenty of fan. It almost never gives trouble.
- PETG: about 30 °C more at the nozzle and a hotter bed, with a moderate fan. It strings more and sticks hard to smooth PEI.
- ABS: needs an enclosed printer, a very hot bed and ventilation for the fumes.
ABS vs PLA and ABS vs PETG
ABS beats both on service temperature and can be smoothed with acetone, but it is the hardest to print and gives off the most odor and particles. Compared with PETG, it only pays off when the part works at a temperature PETG cannot take or when you need that smoothed finish. Compared with PLA, it wins on heat and toughness and loses on stiffness, precision and convenience.
When to choose PLA, PETG or ABS
| Part | Best choice |
|---|---|
| Prototypes, models, figurines, decoration | PLA |
| Brackets, clips, everyday parts | PETG |
| Bathroom, kitchen or water-contact parts | PETG |
| Parts near a heat source | ABS or ASA |
| Parts in the sun or outdoors | ASA |
| First printer, no experience | PLA |
Frequently asked questions about PLA vs PETG
Is PETG better than PLA?
Not at everything. PETG is tougher and takes more heat; PLA is stiffer, more precise and easier to print. For functional parts PETG is usually the better fit; for decoration and prototypes, PLA.
Can I print PETG with PLA settings?
No. It needs a higher nozzle and bed temperature and less fan. Use the values on your spool's datasheet or the medians on the library's PETG page.
Is PETG harder to print than PLA?
A little: it strings more and you have to watch bed adhesion. But it does not need an enclosed printer, so it is the natural step after PLA.